Loops in Form - where are my serialized

[Szemere Szemere]

I'm using a Loop in a Form to create a list of checkboxes. I'm having
trouble getting hold of the list after it has been submitted. How is it
possible to get hold of the collection of objects associated with the loop?

The individual checkBoxItems get serialised fine, but a persisted list of
them (the List is set in the getCheckBoxListItems() method) seems to be
recreated with different items (different object id's).

I've found a way to make it work, by using a PrimaryKeyEncoder and adding
all the items to a Set<CheckBoxItem> in the toValue(Long key) method. This
doesn't seem a transparent and robust way to do it. Better suggestions?

Szemere

Skeleton code:
   private Set<CheckBoxItem> encoderItems = new HashSet<CheckBoxItem>();

    private final PrimaryKeyEncoder<Long,CheckBoxItem> encoder =
        new PrimaryKeyEncoder<Long,CheckBoxItem>()
    {
        //other methods removed for clarity

        public CheckBoxItem toValue(Long key) {
            CheckBoxItem item = lookup(key);

            encoderItems.add(item);

            return item;
        }
    };